When running A/V cables through the wall from and entertainment center area to monitor (~20'), is there a rule of thumb of when to use wall plates to terminate and patch individual cable runs? Does it vary by the type of cable? For example, when running speaker wire from and A/V receiver, through the wall, to speakers by the monitor, what, if any difference will it make between a) running one wire per speaker or b) running from the receiver to a wall plate, then to another wall plate (in-wall), and, finally, back out to the speakers? Will the additional connectors in the cable run impact performance? The same questions for video? How much would connectors in the wall plates impact composite? s-video? component? Using wall plates provides a much cleaner installation and look, but I can't find information on their impact on these different types of cables and signaling. I am particularly concerned about the higher-end video cables. Thanks.